INTERACTIVE SCALE

Dinosaur Size Comparison

Choose two dinosaurs to compare common adult length and body-mass estimates. Every estimate remains provisional because fossils differ in completeness and growth stage.

Dinosaur ADinosaur B

Tyrannosaurus rex

12.3 m

Estimated mass 8.8 t

Triceratops

9 m

Estimated mass 9 t

Adult human

1.7 m

Values are common adult estimates. Specimens, growth stage and mass models vary; the graphic compares length, not volume.